They are great heads that are inexpensive and kill a deer just as dead as any other broadhead you can buy. I've killed deer, hogs and turkey with them with no issues. They are usually sharp enough to use when removed from the package. I personally like two blade heads the best, followed by three and then four, but they all do the trick. Four blade heads may give more assurance of a blood trail, for obvious reason, when compared to a two blade. A three blade head is an excellent compromise that really doesn't compromise much at all.
Allan
Allan